The natural park of Los Alcornocales covers some 170,000 hectares and is the third largest of the protected natural spaces in Andalusia. It lies almost entirely within the province of Cadiz with the exception of its north eastern border, which falls within the province of Malaga.

The size and shape of Los Alcornocales natural park is likewise defined by a series of abrupt hill and mountain mountain ranges following a general north-south pattern, in addition to the surrounding natural demarcation boundaries: the natural park of Sierra de Grazalema to the north; Depresión de la Janda and the Sierra de Fates to the south east; Estrecho de Gibraltar (Straits of Gibraltar) and the River Guadiaro to the south east and east respectively. At its widest, Los Alcornocales reaches 35km from east to west, and is some 80km long from north to south. The highest point in Los Alcornocales is the Pico del Aljibe, measuring 1,092 metres.